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  <h1 class="topictitle1">Encrypting the Plaintext Private Key File</h1>
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   <p>When updating the <strong><span><strong>ProtectAgent Certificate</strong></span></strong>/<strong><span><strong>Server Certificate</strong></span></strong>/<strong><span><strong>Internal communication Certificate</strong></span></strong>, ensure that the imported private key file is encrypted. This section describes how to use the OpenSSL tool to encrypt the plaintext private key file.</p>
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    <h4 class="sectiontitle">Prerequisites</h4>
    <p>The OpenSSL tool has been installed on the local maintenance terminal.</p>
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    <h4 class="sectiontitle">Procedure</h4>
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     <li><span>In the directory where the plaintext private key is stored, run the following command to encrypt the plaintext private key:</span><p></p><pre class="screen">openssl rsa -aes256 -in<em> arg1</em> -out <em>arg2</em></pre> <p>In the preceding command, <em>arg1</em> indicates the name of the original private key file, and <em>arg2</em> indicates the name of the encrypted private key file.</p> <p></p></li>
     <li><span>Enter the encryption password twice as prompted.</span></li>
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